Typewriter



Dec. 13, 1927. 1,652,463

0. TYBERG TYPEWRITER Filed Jan. 26, 1925 2 Sheets-Sheet 1 F 1' .l. H 234 r1 EX ufim "hm-m 1T INVENTOR Dec. 13, 1927.

O. TYBERG TYPEWRITER Filed Jan. 26, 1925 2 Sheets-Sheet 2 A24 34; I I

INVENTOR Patented 13, 1927.

name STATES GLUE? 'LYIBERG, GE POINT ILQMA, CALIEQRHIA.

TYPEWBITEEL.

Application filed January This invention relates to power type writers, especlally to the class of ma chines which employ a revolving type-car rier. One object of this invention is to provide suitable adjustments for altering the force of printing impact; another object is to provide somenew and convenient facilities connected with the shift mechanism.

Other objects are to provide suitable means where a normally revolving typewheel is' subjected to two corresponding motions in opposite directions at the same time, for the purpose of taking impression therefrom.

The corresponding parts in the two applications are indicated by similar reference letters.

In the accompanying drawings, consist ing of two sheets, Fig.. 1 is a partlal front view of the typewriter embodying my invention. Fig. 2 is aside elevation of the same, (center-section on the lines a-a of Fig. 1) showing the working parts in thelr normal position. Fig. 3 is a partial view of the same, showing the working parts in active operation. Fig, 4 is a top view of the printing and inking mechanism.

The portion of the frame below plate 6 is indentical in both applications, except for such slight modifications as will be referred to hereinafter. On the top of plate 6 are fastened two side-brackets 7, which-support the plate 8. 0n the front portion of the plate 8 are mounted two uprights 9 and 10, and upon its rear portion is mounted the carriage-frame 200. This frame extends the full lengthof the carriage travel, and is provided at each end with uprights 231 and 232. Only one of these uprights is shown. These two uprights support a top-bar 234, upon the front side of which is situated the 26, 1925. Serial 3:30. 4,938.

impression block 235, against which the so printing is to be done. The printing againsta stationary impression block, instead of upon a rotary platen, mounted in a movable carriage, introduces a number of distinct advantages. It not only makes it easier to establish and maintain aproper printing contact, but it also eliminates wear and reduces noise. It also makes possible the introduction of a properly constructed impression shield, as well as the use of a much smaller typewheel, for it allows the letters on such a wheel to be placed much closer together. All of these features tend to increase the accuracy of alignment and the efficiency of the machine. The paper car- 5 riage is mounted on a rod 260, supported in the two uprights 231 and 232. The construction of the carriage, which includes a main feed-roller 271 and two pressure-rollers 272 and 273, is only indicated in Fig. 2, as its detailedconstruction and the manner of controlling its movements do not form part of the subject matter of this invention. The rotary carrier 13 and the mechanism belonging thereto are identical to that shown ul my earlier application. Only the typewheel-shaft 62 has been reduced in size and increased in length, in order to permit a certain amount of flexibility; for instead of making a hammer strike the typewheel, as in my earlier application, I propose to make the typewheel strike a stationary platen. The pawl case 40, fastened to the bottom of plate 4 is similar to that shown in my as earlier application. Only the stop-pawl 41 has been slightly modified, by changing the pull-spring 45 in the earlier application to a spring-plunger 45. This spring-plunger pushes against a lip 48 on the inner side of the stop pawl. Also the downward projection 46 in the earlier application, which acted as a limit" stop to the released pawl, has been substituted by a projection 46 on the upper side of the stop pawl, andis so situated as'to limit its free motion by strikin a shoulder 49, situated on the lower si e of plate 4.

A rockshaft 80 is mounted between the lugs 81 on the underside of late 6. This rockshafthas one arm 82 on w ich is mounted a roller 83, resting on the cap 30 of plunger 29 in therotary carrier, and from which it receives its motion, as explained in my earlier a plication. A spiral spring 86 keeps this rockshaft normally in position. Another arm 87 of this rockshaft connects 'by rod 88 to the printing mechanism, to be referred to hereinafter. A third arm 91 carries a pawl'92, whose rear end93 is made to rest normally against the top of plate 6 bythe spring 94. Thepawl 92 connects with the shift mechanism.

As the shift mechanism is most frequently used for writing one single capital letter at a time, I have'introd uced some new and useful features with the view of saving time in restoring the shift mechanism to its normal position. Besides the usual shift key which keeps the ty es intheir shifted position as long as this ey is depressed, I add another self-releasing shift key, which "allows the shift mechanism to be automatically released from this key immediately after one shift letter has been'printed, and while this key is still depressed. This. I accomplish by means of a release motion operated by the mechanism that controls the printing and will now be explained.

The automatic shift key mechanism may be constructed in any suitable manner, and in my preferred construction is as follows. Supported in lugs 110, situated on the underside of plate 8, is a rockshaft 111, whose arm 112 carries a roller 113, made to bear against the lower side of flange 63 on the typewheel shaft 62. A spiral 5 ring 114 is wound on the rookshaft 111, an keeps it in its normal position against the stop pin 115. Another arm 116 of this rockshaft carries a pawl 117. A spiral spring 120 keeps the hook of this pawl gripping a hooked flat rod 122.- Rod 122 is pivoted at its lower end to.

the automatically released shift key 124, which together with the permanent shift key 134, is mounted between lugs 126, situated on A the front part of the casing 2. Whenever the self-releasing shift key 124 is depressed, the hooked rod 122, through the pawl 117 and V its rockshaft 111, raises the typewheel to its shifted position, but at the sametime the lower end of pawl 117 -is pushed down against the pawl 92. As shown in Fig. 1 the lower end of pawl 117 'has been slightly bent in order to line up with the awl 92. Now when one of the printing 'eys has been struck, the action, as has been explained in my earlier application, causes the motion of the rockshaft 80 to push the hook of pawl 92 inbehind the end of pawl 117. This position is shown in Fig. 3. As soon as the rockshaft 80 returns to its normal position, im-

is as follows.

mediately after the printing action (to be explained hereinafter) has e the pawl 92 pulls the pawl 117 away from the hooked rod 122, and permits the'typewheel shaft to return to its normal position while the key 124 is still depressed.

The permanent shift mechanism, which may be constructed in any suitable manner, In the hooked fiat rod 122 is a slot 130, in the bottom of which is located a pin, which is part of a shoulder stud 131. This shoulder stud is fastened at the top of another flat rod 132, which lower end ispivoted to the permanent shift key 134. When this key is depressed it operates the shift mechanism asbefore, through the pin in the slot 130, butas the pawl 92 extends out directly under the shoulder stud 131, the depression of the permanent key causes the pawl-92 to be pushed down and out of contact with pawl 117, and hence makes its release action inoperative. The two rods 122 and 132 are eachindependently held in their normal position by the two springs 123 and 133, so that when the automatic shift key is depressed, the permanent shift key is not affected, because of the freedom of the pin in .the slot 130.

means may be constructed-in any suitable manner, and in my preferred construction are as follows. The upper end of the typewheel shaft 62, directly below the typewheel, is supported in a bearing 140, hinged between the two uprights 9 and 10, already referred to. Another arm 145 on this rockshaft'extends rearward and rests normally on a sleeve 150. This sleeve is slidingly mounted on a square rockshaft 152, also pivoted in and between the two uprights 9 and 10. The sleeve 150 is provided with two differently shaped wings or arms 157 and 158', and has also a groove, by means of which its position is controlled through a pin fastened in an arm 161. This arm is secured to a shaft 162, mountedin a bearing on theftop of plate.8. To the other end of shaft 162 is attached an arm 164, provided with a loose-pin 166. By turning this arm 164 sothat the loose pin 166 may be inserted and held in either one of two corresponding holes drilled in the edge of plate 8, the sleeve 150 may be held so that either one of its en completed,-

two wings will be directly under and in line with the arm 145. -As the wings 157 and 158 are shaped differently, they will produce different speeds to the motion of the typewheel as it strikesthe platen.- Fastened to the square rockshaft itself are two arms, of which the arm 168 is connected by rod 88 to "rockshaft 80, by which it is operated. To the other arm 169 is attached a pawl 170, which operates the inking mechanism now to be described. It should be understood that I do not wish to limit myself to a sleeve with only two arms, as requirements mightmake a larger numbenof adjustments desirable. The construction discloses a practical wayof meeting a particular condition, for it should be understood that as the amount of motion to be given to the typewheel mustalways be the same, the different motions must all be of a nature that permit of a slow start with a, gradually increasin speed. It should also be understood that or practical purposes of assembling it may be advisable to divide the typewheel shaft into two parts, for" instance by holding the two parts solidly together in an extension of the.

collar shown attached to the flange 63., ,Tliis has been indicated by dotted lines in Fig. 2,

The inking-mechanism may be constructed in any suitable way. In my'preferred construction I employ an inking mechanism for inking the typewheel directly each time an impression is takentherefrom. mechanism includes an ink-rolleroperated through w a ratchet wheel motion in the following main ner. 'On the top of upright 10 is, movably mounted a bell-crank 180. (See Figs. 1 and 4. In Fig. 4 the typewheel is indicated only by broken lines.) Tothe one arm of this bell-crank is attached the ink-roller 181, nor mally out of contact with the ty ewheel, while in the other, arm there is out a slot 183, in which is working the reduced upper end of an arm 184. This arm is pivoted onthe inner side ofnp'rig'ht 10, directly below the bell-crank 180. "(Fig 2.) On the arm 184 is a roller .185, which by means of.a pull spring 186 is made to rest normally between "the teeth of a ratchet wheel 188', also mountedon'theu right 10. Ncrmallyresting on the top of the ratch t wheel .188 is the pawl 170, already referred to. This pawl isso shapedthat. when it is pulled back by the motion ofrockshaft 152, itfeedsthe ratchet typewheel.-

wheel one tooth at a tinie as shown in Fig. 3,

and when so doing lifts the roller 185 over into the next tooth.v This moves the arm 184 and, by its connection with the bell crank 180, forces the ink roller against the In order to make this-contact of theink roller of a. yielding nature, the

duced in widthtoa state of flexibility;- It should be understood that this motion isso adjusted, that. the particular letter to be I printed is inked when the ink roller contacts the typewheel. i

The impression shield may be constructed inany suitable manner. I prefer to combine such a shield. with an alignment strip running thefnll length of the carriage travel. This'alignmentstrip' 190 consists of a flexible band, the two ends of which are respectively" fastened to the front of the two end uprights 231 and232 of the carriage frame, and so situated that its upper edge is in line with the bottomof the printing, while its lower edge meets the "aper as it comes from the feed rollers, and guides it in between the alignment strip and thefront face of the top-bar 234. Directl opposite. the

impression block 235, the a ignment strip has been widened out, and an opening provided directly opposite the impression block. When the printing takes place, the flexible strip 'is forced against the paper by the typewheel, and only the particular letter to" be printed is permitted to come in contact with the paper.

Haring thus fully described my invention, what I claim as new-and useful is 1. The combination of a rinting mechanis'm, means for operating t 1e same, a cascshift-key, releasable connections normally connecting said shift-key to said shift mechanism, and means operated by said actuator forreleasing said shift mechanism from said shift-key immediately after a single shift-letter has beenprinted and while said shift-key is still depressed.

3.'The combination of a platen, a typewheel, a key-controlled power-driven ac: tnating mechanism for producing contact between said platen and any selected type on Y said typewheel, a case-shift meohanism, a 1

shift-key, releasable connections. normally connecting said shift-key to said shift mechanism, and means operated by said actuat ing mechanismfor releasing said shift mech anism from"- said shift-key immediately after as'ingle shift-letter has been printed and while said shift-key is still depressed.

4. The combination of a rinting mechanism,means forbperating t e same, a case- 'shift mechanism, a permanent v shift-key that operates said shift mechanism continuously while depressed, a releasable shiftkey normally connected to said shift mechanism, and means for disconnecting said releasable shift key from said shift mechanism immediately'aft'er a single shift letter has been printed and while said shift key is still depressed.

5. The combination of a continuously rotated driver, a key-controlled printing mechanism operated by said driver, a.case shift mechanism, a releasable shift-key nor mally connected to said shift mechanism, and means operated by said driver for disconnecting said releasable shift key from said shift mechanism immediately after a single shift letter has been printed and while said shift key is still depressed.

6. The combination of a platen, a typewheel mounted on a continuously rotated driver, a key-controlled actuating mechanism operated by said driver for bringing any selected type in contact with said platen, a case-shift mechanism, a permanent shiftkey that operates said shift mechanism continuously while depressed, a releasable shiftkey normally connected to said shift mechanism, and means operated by said actuating mechanism for releasing said shift mechanism from said releasable shift-key immediately after a single shift-letter has been printed and while said shift-key is still de pressed.

7. The combination of a platen, a typewheel secured to a solid flexible shaft, said shaft mounted fin cylindrical bearings, a type selecting device, and means for bending said flexible shaftand for bringing any selected type on said typewheel in contact with said platen.

8. The combination of a platen, a type-- wheel secured to a solid flexible shaft, a keyboard controlled type selecting device, and means for bending said flexible shaft and bringing any selected type on said typewheel in contact with said platen.

9. The combination of a platen, a continuously rotated driver, a typewheel secured to a solid flexible shaft and mounted on said driver, a type selecting device, and means for bending said flexible shaft and for bringing any selected type on said typewhcel in contact with saidplaten.

10. The combination of a printing mechanism, key-controlled power-driven means for operating the same, and said means comprising an adjustable device with shiftable arms of different shapes for altering the force of the printing impact. 1

11. The combination of a continuously rotated driver, a printing mechanism, a keycontrolled rockshaft for operating said printing mechanism and operated by said driver, and an adjustable device slidingly mounted on said rockshaft for altering the force of the printing impact.

12. The combination of a printing mechanism, a key-controlled rockshaft for operating said printing mechanism, a sleeve rovided with differently shaped arms ad ustr ably mounted on said rockshaft for the purpose of altering the force of the printing impact.

13. The combination of a platen, a continuously rotated driver, a typewheel, a

printing mechanism for producing contact etween said typewheel, and said platen, a key-controlled rockshaft for operating said printing mechanism and operated by said driver, and an adjustable sleeve slidinglg -mounted on said rockshaft and provi with'means for altering the force of the printin impact.

14. The combination of a platen, a 0011' shaped arms slidingly mounted on said rockshaft,.and a separate device for adjusting the position of said sleeve on said rockshaft for the purpose of altering the force of the printing contact.

15. The combination of a platen, a continuously rotated typewhcel, keyecontrolled power-driven means for making said typewheel produce a printing impact against said platen, and said means comprising an adjustable device with shiftable arms of different shapes for altering the force of the printing impact.

16. The combination of a platen, a typewheel mounted on a flexible shaft, ke -controlled power-driven means for pro ucing contact between said platen and said typewheel, and an adjustable device for altering the force of said contact.

17. The combination of a platen, a continuously rotated typewheel, key-controlled wet-driven means for bringing any seected type in rinting contact with said platen, an ink-r0 ler normally out of contact with said typewheel, and an inkin mechanism operated by said means for tlirowing said ink-roller into contact with said selected type before said type reaches the printing position.

18. The combination of a platen, a type wheel, key-controlled power-driven means for bringing any selected ty e in printing contact with said platen, an ink-roller normally out of contact with said t*pewheel, and an inking mechanism including a. ratchet-wheel motion for' throwing said inkroller into contact with said selected type before said type reaches the printing position. l

19. The combination of a stationary impression block, a continuously rotated ty ewheel, an.impression shield interposed between said platen and said typewheel, a keycontrolled power-driven mechanism for bringing any selected type in contact with said impression block, an ink-roller norsaid t-ypewheel strike said platen, and an 1 mally out of contact with, said typewheel, alignment strip fastened to the ends of said and mechanism for bringing said ink-roller frame and provided with suitable means for into contact with any type on said typeacting as an impression-shield when said 5 wheel selected for printing. typewheel strikes said platen.

20. The combination of a carriage slid- Signed by me at Point Lorna, California, 1 ingly mounted in a frame extending beyond this 13th day of January, 1925. the'carriage travel, a platen mounted in said frame, a typewheel and means fonmaking OLUF TYBERG. 

